EP 2045492 B1 20140226 - Rock breaking device, protection valve and a method of operating a rock breaking device
Title (en)
Rock breaking device, protection valve and a method of operating a rock breaking device
Title (de)
Vorrichtung zum Aufbrechen von Gestein, Schutzventil und Verfahren zum Betreiben einer Vorrichtung zum Aufbrechen von Gestein
Title (fr)
Dispositif brise-roche, clapet de protection et procédé de fonctionnement d'un dispositif brise-roche
Publication
Application
Priority
FI 20075704 A 20071005
Abstract (en)
[origin: EP2045492A2] The invention relates to a hydraulic rock breaking device, a protection valve and a method of operating a hydraulic rock breaking device. The rock breaking device comprises a percussion device (4) to which pressure fluid is fed along an inlet channel (13). The inlet channel is provided with a protection valve (23) arranged to monitor the volume flow of pressure fluid flowing through it. If the flow is larger than what has been preset, the protection valve closes, at least partly, the connection through it, protecting thus the percussion device against too high an input power. The protection valve comprises a throttle (38) which generates a pressure difference the magnitude of which is dependent on the fed volume flow. Information on the pressure difference is utilized in controlling the protection valve.
IPC 8 full level
F16K 17/08 (2006.01); B25D 9/00 (2006.01); B25D 9/14 (2006.01); E02F 3/96 (2006.01); E02F 9/22 (2006.01); F15B 1/02 (2006.01); F15B 13/02 (2006.01); F15B 13/04 (2006.01); F15B 21/12 (2006.01); F16K 17/10 (2006.01)
CPC (source: EP FI KR US)
B25D 9/145 (2013.01 - EP FI KR US); B25D 9/26 (2013.01 - FI); E02F 3/966 (2013.01 - EP KR US); E02F 9/221 (2013.01 - EP KR US); E02F 9/2217 (2013.01 - EP KR US); E21B 1/26 (2020.05 - EP); E21B 7/022 (2013.01 - FI); E21B 44/00 (2013.01 - FI); F15B 1/024 (2013.01 - EP KR US); F15B 20/00 (2013.01 - FI); F15B 21/12 (2013.01 - EP FI KR US); F16K 17/082 (2013.01 - EP KR US); F16K 17/34 (2013.01 - FI); F15B 2211/40 (2013.01 - EP KR US); F15B 2211/428 (2013.01 - EP KR US); Y10T 137/8667 (2015.04 - EP US); Y10T 137/86767 (2015.04 - EP US); Y10T 137/86775 (2015.04 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2045492 A2 20090408; EP 2045492 A3 20130220; EP 2045492 B1 20140226; CN 101403223 A 20090408; CN 101403223 B 20120222; ES 2454240 T3 20140410; FI 123634 B 20130830; FI 20075704 A0 20071005; FI 20075704 A 20090406; JP 2009090458 A 20090430; JP 5210111 B2 20130612; KR 101532437 B1 20150629; KR 20090035455 A 20090409; KR 20130131261 A 20131203; US 2009090525 A1 20090409; US 8118112 B2 20120221
DOCDB simple family (application)
EP 08165566 A 20081001; CN 200810168981 A 20081006; ES 08165566 T 20081001; FI 20075704 A 20071005; JP 2008258216 A 20081003; KR 20080097362 A 20081002; KR 20130112413 A 20130923; US 28543308 A 20081003